FAQ
Common questions
Everything you might want to know before joining the TestFlight beta.
Do I need to sleep with my Apple Watch on?
No. Trana works best with full-day data, but it degrades gracefully. If you only wear your watch during the day, Trana uses a 5-tier data quality system — it tells you what it can and cannot compute honestly, and never shows a score it cannot defend.
How is this different from RISE or Oura?
RISE estimates your circadian rhythm from phone motion — no biometrics. Oura gives you a readiness score. Neither tells you your peak window from actual heart rate data, and neither tracks how fast your clock is drifting. Trana uses cosinor analysis on your raw heart rate — the same method chronobiologists use in clinical research.
Why does it take 7 days?
Because population averages are useless for telling you anything about you specifically. After 7 days, Trana has your personal baseline — your peak time, your drift rate, your normal. Every recommendation after that is compared to you, not to an average. Day 3 shows your estimated peak. Day 5 shows your first drift signal. Day 7 unlocks everything.
Is this a medical device?
No. Trana is not a medical device and makes no diagnostic claims. It surfaces patterns in your existing Apple Watch or WHOOP data in plain English. If you have a clinical sleep concern, see a doctor.
What does it cost?
Trana is free during the TestFlight beta.
What if my baseline is already drifted when I start?
Yes, that can happen — and Trana doesn't pretend otherwise. The 7-day calibration captures your currentrhythm as YOUR normal, not as “healthy.” If you start Trana while you're already in a rough season — shift work, a newborn, finals week, jet lag, the dead of winter — that's the rhythm that becomes your reference point.
There is no universal peak time. A natural night owl whose clock peaks at 5 PM is just as biologically normal as a lark whose peak lands at 11 AM. Trana learns YOUR current rhythm so it can tell you when things shift away from it later. As your habits change, the baseline updates.
Even with a drifted starting baseline, Trana surfaces three things that are meaningful regardless of where your peak lands: (1) your sleep regularity, (2) your social jet lag, and (3) your day-to-day phase shifts from your own pattern. These don't depend on you being “aligned” to anything.
Ready to try it?
Join the TestFlight beta